#!/usr/bin/env python
# -*- encoding: utf-8 -*-
# Project: spd-sxmcc
"""
@file: map_test.py
@author: lyndon
@time: Created on 2021-11-23 17:10
@env: Python
@desc:
@ref:
@blog:
"""

if __name__ == '__main__':
    m1 = {}
    print(len(m1))
    m2 = {'a': 1}
    print(len(m2))
    # h = hasattr(m2, 'a')
    print('a' in m2)
    print('a' in m1)

